Release dbt v0.17.1rc4

Release dbt v0.17.1rc3

Release dbt v0.17.1rc2

Release dbt v0.17.1rc1

Release dbt v0.17.0

Add dbt:0.16.1 dockerfiles and requirements

Bump version: 0.16.0rc4 → 0.16.0

Bump version: 0.16.0b2 → 0.16.0b3

Bump version: 0.16.0a2 → 0.16.0b1

Bump version: 0.15.2a1 → 0.15.2